公开(公告)号：US20230014619A1

公开(公告)日：2023-01-19

申请号：US17781963

申请日：2020-12-04

Applicant: Kemira Oyj

Inventor： Veli-Matti VUORENPALO ,  Jonni AHLGREN ,  Jaakko HILTUNEN ,  Anna-Maija PERANDER ,  Chunlin XU ,  Sanna LEHTO ,  Eija AHONEN ,  Tarja IKÄVALKO

IPC: C08B11/14 ,  C08B1/08

Abstract: The invention relates to a method for producing cationized cellulose. The method comprises at least preparing a slurry of a cellulosic starting material in an alkaline liquid medium which comprises an organic liquid and performing mercerization of the slurry. The concentration of the cellulosic starting material in the slurry is at least 20 weight-%, calculated as dry from total weight of the liquid medium and the cellulosic starting material. A cationizing agent is added to the slurry after the mercerization step at a cationization temperature, which is less than the boiling point of the alkaline liquid medium, and the cellulose in the slurry is allowed to react with the cationizing agent, preferably under inert atmosphere and a cationized cellulose product is obtained.